logger incorrectly prints rehydrated to undefined (#26)
logger incorrectly prints rehydrated to undefined (#26)

newState is not a plain js object, it's an `immutable.Map`. Previously it would print `undefined` when in fact it was correctly rehydrated to part of the state.

I also removed `new` from the immutable Map creation. This isn't required as it's a factory.
rt2zz/redux-persist-immutable